It could be, though it's unlikely. If you're curious, you can look
through the yellow pages for asbestos abatement. Find a lab that does
testing, possibly by calling abatement contractors to ask them who they
use for testing. If you wet the sample area with a small spray bottle
of water and a touch of dish detergent to prevent dust, put a small
sample in a bag or small jar and take it in for testing. Should cost
less than $100 to find out.